Health official: All confirmed cases in Shanghai linked

There are clear epidemiological links between all 16 locally transmitted COVID-19 cases in Shanghai, and none of them contracted the virus from an unknown contact, a senior health official said on Wednesday.

"The first three cases reported last Thursday were discovered through proactive efforts, and the following 13 were found within the closed-loop management of the relevant individuals of the cases," Wu Jinglei, director of the Shanghai Municipal Health Commission, said at a municipal press briefing.